Hi Guy, In Rhino How I can split ellipsoid to 2 parts [image] Thanks

If the results do not need to be closed then Split command. Assuming a single surface use the Isocurve option of the Split command for the split location. If the result need to be closed. Alternative 1: Split as above PlanarSrf command on the new edges Join Alternative 2: Create a plane wher…

Thank David Alternvative 2 not work [image]

Upload a .3dm file with the unsplit object and the plane to use as the splitting tool.

Hi, Please check in my file Rhino model.3dm (454.9 KB)

If the seam ends are both on the split plane, the split fails. [image] split_with_seam_ends_on_plane.3dm (290.9 KB)

Another option is cutplane cutplane

This is a bug in the Ellipsoid command. If you ShowEdges, naked, you’ll see that the ellipsoid isn’t properly closed at the poles. RH-70897 Ellipsoid has bad poles

… oh and _removeallnakedMicroEdges completely destroys the ellipsoid with bad poles… … and (what a pity) _setPt does not repair the poles in one go. … BUT moving 7 of the 8 CV s at the pole, to random positions and then use _setPt to set them all to the same (initial) position - fixing the pole i…

This is a “Far from origin” issue, even though it isn’t really that far. If you move the ellipsoid so that the center is at (0,0,0), SetPt works. It seems it should work without moving. Probably the same problem that caused the ellipsoid to be bad in the first place. I see that Mikko fixed Ellip…

[image] Chuck Welsh: I’ll look into SetPt failing to make the points identical. thanks.

Split Ellipsoid

Rhino Rhino for Windows

brian (Brian Gillespie) October 25, 2022, 10:03pm 12

RH-70897 is fixed in the latest WIP

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Split Ellipsoid

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